不过航空运输延迟和低效的主要原因还是过时的空中交通管制——一套依靠地面控制、反应迟缓的雷达站和不断重复的语音通讯建立起来的体系。

But delays and inefficiencies in air travel are due in large part to an outdated traffic-control system that still relies on slow, ground-based radar stations and repetitive voice communication.

youdao

上世纪80年代以来，西方发达国家逐渐放松了对航空运输业的管制，导致横向并购大量增加。

Since the 80s of last century, Western developed countries are gradually relaxed the control of the air transport industry, which led to a significant increase in merger events.

youdao

上世纪80年代以来，西方发达国家逐渐放松了对航空运输业的管制，导致横向并购大量增加。

Since the 80s of last century, Western developed countries are gradually relaxed the control of the air transport industry, which led to a significant increase in merger events.

youdao